If you’ve spent even a few hours wandering the whimsical open world of Infinity Nikki, you’ve definitely grown attached to Momo, the sassy, snack-obsessed talking cat that sticks by Nikki’s side through every quest, styling challenge, and silly detour. Momo has been a core staple of the Nikki franchise for more than a decade, so when the first 3D open-world entry was announced, long-time fans were desperate to learn who would bring their favorite feline sidekick to life. One of the most common questions new and long-time players ask is who voices Momo in Infinity Nikki, and it’s no surprise — the character’s snappy one-liners and over-the-top reactions make every cutscene feel more fun, and a lot of that charm comes straight from the voice actors behind the role. I’ve spent months digging through official developer updates, cast interviews, and fan communities to pull together all the confirmed details, plus a few fun Easter eggs you might not have caught during your playthrough.
Who Voices Momo in Infinity Nikki? Confirmed Cast for All Regions
Infinity Nikki is released globally with four fully localized dubs, so Momo has a different voice actor for each major region, all hand-picked by the development team to match the character’s core personality. The team prioritized actors who could balance Momo’s signature snark, hidden soft side, and obsession with tuna snacks, and fans have almost universally praised the casting choices across all dubs.
Japanese dub: Momo is voiced by Rie Kugimiya, the legendary voice actor best known for playing tsundere characters like Kaguya in Love is War, Happy in Fairy Tail, and Alphonse Elric in Fullmetal Alchemist: Brotherhood. Kugimiya’s signature high-energy delivery fits Momo perfectly, especially during the character’s more dramatic tantrums when he doesn’t get his favorite snacks.
English dub: The official English voice of Momo is Cassandra Lee Morris, who you might recognize from roles like Morgana in Persona 5, Sothis in Fire Emblem: Three Houses, and multiple characters in Genshin Impact. Morris brings the same perfect balance of sass and sweetness to Momo that made her performance as Morgana such a fan favorite, and a lot of her ad-libbed lines made it into the final game.
Mandarin Chinese dub: Momo is voiced by Tao Dian, a veteran voice actor who has worked on dozens of popular domestic animations and games, including previous entries in the Nikki franchise. Tao has voiced Momo for more than 10 years, so long-time fans of the series will immediately recognize her familiar performance.
Korean dub: The Korean voice of Momo is Park Ji-yoon, known for her work on popular gacha game characters and animated series. Park’s performance leans into Momo’s playful side, and she’s said she had so much fun recording lines for the character that she often stayed late to record extra takes for minor interactions.
What Makes Momo’s Voice Performance Stand Out for Players
Momo is far more than just a generic sidekick in Infinity Nikki. He acts as your quest guide, comic relief, and even occasional voice of reason when Nikki gets too distracted by cute outfits to remember the task at hand. A huge part of why the character feels so lovable comes down to the thought put into the voice direction for every region.
Momo’s dynamic line delivery is what makes even repetitive side quests feel fresh. For example, when you miss a styling challenge requirement, he doesn’t just deliver a generic error line — he teases you a little, then offers gentle encouragement, which feels way more personal than most game companion lines. The development team worked closely with each voice actor to adjust lines for local humor, so jokes land naturally no matter what language you play in.
A lot of players don’t realize that the voice cast recorded extra lines specifically for random open-world interactions, like when you find a hidden snack chest or stumble on a rare outfit material. Those little unscripted-sounding lines are why so many fans list Momo as one of their favorite parts of the game. I’ve even seen players share clips of Momo’s random comments online, with many saying they’ve delayed finishing main quests just to wander around and hear more of his lines.
Fun Behind-the-Scenes Facts About Momo’s Voice Recording
The cast has shared a ton of behind-the-scenes details in interviews over the past few months, and some of the stories are way more interesting than you’d expect. The development team gave the actors a lot of creative freedom with the role, which led to a lot of fun little touches that make it into the final game. Here are a few of my favorite highlights:
- Rie Kugimiya was the dev team’s first choice for the Japanese dub of Momo, before the game even entered full production. They said they wrote the character’s personality with her signature voice in mind, so she didn’t even have to audition for the role.
- Cassandra Lee Morris recorded most of her Momo lines in the same home studio she used for her Persona 5 work. She’s said she often ad-libbed little extra jokes during recording, and the devs liked so many of them they added the lines to the final game.
- The Mandarin voice cast recorded group sessions with Nikki’s voice actor for major cutscenes, so the banter between Momo and Nikki feels far more natural than if they’d recorded lines separately. Many of the offhand comments between the two characters are unscripted.
I love that the devs let the actors put their own spin on the character, because that’s exactly what makes Momo feel like a real friend instead of just a generic game NPC. If you listen closely during late-game cutscenes, you can even catch a few of the ad-libbed lines Morris mentioned, including a silly joke about Momo’s obsession with tuna snacks that wasn’t in the original script.
How to Hear All of Momo’s Hidden Voice Lines in Your Playthrough
Most players only hear about 60% of Momo’s total lines during a regular playthrough, because a lot of them are tied to hidden interactions most people miss. If you’re a big Momo fan and want to catch every line he has, there are a few simple tricks you can use to unlock all his hidden dialogue.
First, make sure to interact with Momo at your home base every time you return from a quest. He’ll have new lines every time you unlock a new outfit region, rank up your styling level, or bring him back a snack from a nearby vendor. You can even give him gifts you find around the world to unlock special lines only available when you raise your friendship level with him.
Second, don’t skip random open-world events like helping a villager find their lost pet or picking up random trash items scattered across the map. Momo has unique lines for almost every random interaction, including a very dramatic reaction to stepping in mud during the rainy season. I spent an entire afternoon just running around the starting region testing random interactions, and I found a line where Momo complains about Nikki spending all their money on hair clips that I had never heard before in 50 hours of regular play.
Third, try out different dialogue choices during cutscenes. Even if the choice doesn’t change the main quest outcome, Momo will respond differently depending on what you pick, and some of those lines are extremely funny. You can also adjust your in-game settings to turn up the character voice volume, so you don’t miss any of Momo’s quiet asides when you’re exploring open areas with background music playing.
At the end of the day, the question of who voices Momo in Infinity Nikki has a pretty cool answer no matter what region you play in — every actor cast in the role brings their own unique charm to the character, and it’s clear all of them had a lot of fun working on the project. Next time you’re playing, take a minute to pause and listen to Momo’s lines, you’ll probably pick up on little details in the performance you never noticed before. If you have a favorite Momo line, feel free to share it with other fans in the community, it’s always fun to see which parts of the performance resonate with other players.